.bixol-history-block {
  position: relative;
  z-index: 1;
  padding: clamp(30px, calc( (80 / 1920) * 100vw ), 80px) 0;
  background: #f4f4f4; /* 匹配参考图浅灰背景 */
}

.bixol-history-block p {
  line-height: 1.5;
  margin: 0;
}
.bixol-history-block a {
  text-decoration: none !important;
}
/* 移除原左侧背景图样式 */
.bixol-history-block .ab-history-left-img {
  display: none;
}

/* 标题区域样式 */
.bixol-history-block .ab-history-top {
  text-align: center;
  margin-bottom: 60px;
}
.bixol-history-block .ab-history-top .title {
  display: flex;
  justify-content: center;
  margin-bottom: 15px;
}
.bixol-history-block .ab-history-top .title .bixol-subtitle {
  font-size: 18px;
  position: relative;
  color: var(--color-primary);
  display: flex;
  font-weight: 600;
  align-items: center;
}
.bixol-history-block .ab-history-top .title .bixol-subtitle .img {
  width: 25px;
  height: 25px;
  margin-right: 10px;
}
.bixol-history-block .ab-history-top h3 {
  margin-top: 0;
  font-size: clamp(24px, 2.7vw, 50px);
  color: #000000;
  line-height: 1.2;
  font-weight: 700;
  text-transform: capitalize;
  text-align: center; /* 参考图标题居中 */
}

.bixol-history-block .ab-history-top h3 span {
  font-weight: 700;
  line-height: 1;
}
.bixol-history-block .ab-history-top .bf-desc p {
  margin-bottom: 0;
  white-space: pre-line;
  font-size: clamp(14px, 0.85vw, 16px);
  color: #333;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 991px) {
  .bixol-history-block .ab-history-top .bf-desc p {
    margin-top: 15px;
  }
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-top .bf-desc p {
    white-space: normal;
    padding: 0 15px;
  }
}

/* 时间轴核心样式 */
.bixol-history-block .ab-history-tab {
  margin-top: 0;
}
.bixol-history-block .ab-history-tab .tab-control {
  position: relative;
  text-align: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}
/* 时间轴横线 */
.bixol-history-block .ab-history-tab .tab-control .tab-devider {
  width: 90%;
  z-index: 1;
  position: relative;
  margin: 0 auto;
}
.bixol-history-block .ab-history-tab .tab-control .tab-devider hr {
  margin: 0;
  border-top: 1px solid #999;
  opacity: 1;
}
.bixol-history-block .ab-history-tab .tab-control .tab-devider .iconfont {
  display: none; /* 移除原箭头 */
}
/* 时间节点列表 */
.bixol-history-block .ab-history-tab .tab-control ul {
  display: flex;
  justify-content: space-around;
  width: 90%;
  position: absolute;
  top: -8px; /* 圆点覆盖横线 */
  left: 0;
  right: 0;
  margin: auto;
  padding: 0;
  z-index: 2;
}
.bixol-history-block .ab-history-tab .tab-control ul li {
  display: block;
  flex: 1;
  text-align: center;
}
.bixol-history-block .ab-history-tab .tab-control ul li a {
  position: relative;
  display: block;
  color: #555;
  opacity: 1;
  font-weight: 600;
  font-size: clamp(12px, 0.95vw, 18px);
  transition: all 0.3s ease-in;
  padding-top: 25px; /* 圆点在文字上方 */
  cursor: pointer;
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-tab .tab-control ul li a {
    padding-top: 20px;
  }
}
/* 圆点样式 */
.bixol-history-block .ab-history-tab .tab-control ul li a::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  width: 18px;
  height: 18px;
  background-color: #333; /* 未激活圆点黑色 */
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px #999;
}
/* 激活状态（当前选中） */
.bixol-history-block .ab-history-tab .tab-control ul li a.active {
  color: #d9232e; /* 参考图红色 */
}
.bixol-history-block .ab-history-tab .tab-control ul li a.active::after {
  background-color: #d9232e; /* 激活圆点红色 */
  border-color: #d9232e;
  box-shadow: none;
}
.bixol-history-block .ab-history-tab .tab-control ul li + li {
  margin-left: 0; /* 移除原间距，用flex均匀分布 */
}
@media (max-width: 768px) {
  .bixol-history-block .ab-history-tab .tab-control ul li + li {
    margin-left: 0;
  }
}

/* 🔴 核心修复：解决切换跳动的关键样式 */
.bixol-history-block .ab-history-tab .tab-content {
  padding: 40px 20px 0;
  text-align: center;
  margin-top: 30px;
  /* 固定容器高度，由最高面板决定，避免切换时高度变化 */
  min-height: 120px; 
  position: relative;
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-tab .tab-content {
    /*padding: 20px 15px 0;*/
    margin-top: 20px;
    min-height: 100px;
  }
}
/* 移除fade动画，用绝对定位+透明度切换，彻底消除跳动 */
.bixol-history-block .ab-history-tab .tab-content .tab-pane {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  display: block !important; /* 强制block，避免display切换导致高度抖动 */
}
.bixol-history-block .ab-history-tab .tab-content .tab-pane.show.active {
  opacity: 1;
  visibility: visible;
}
.bixol-history-block .ab-history-tab .tab-content .history-content {
  padding: 0;
}
.bixol-history-block .ab-history-tab .tab-content .history-content h4 {
  /* font-weight: 700; */
  margin-bottom: 10px;
  color: #d9232e; /* 展会名红色，匹配参考图 */
  font-size:clamp(14px, 1.9vw, 36px);
  text-transform: uppercase;
  margin: 40px 0 0px 0;
}
.bixol-history-block .ab-history-tab .tab-content .history-content h4 span{
 color: #000000;
  padding: 0 0 0 40px;
  text-transform: capitalize;
  font-weight: 100 !important; /* 最细 */
  opacity: 0.85;
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-tab .tab-content .history-content h4 {
    margin-top: 30px;
  }
}
.bixol-history-block .ab-history-tab .tab-content .history-content .location {
  font-size: 28px;
  color: #000;
  font-weight: 500;
  margin-bottom: 15px;
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-tab .tab-content .history-content .location {
    font-size: 20px;
  }
}
.bixol-history-block .ab-history-tab .tab-content .history-content p {
  width: 100%;
  display: inline-block;
  font-size: 16px;
  color: #333;
  max-width: 900px;
}
@media (max-width: 767px) {
  .bixol-history-block .ab-history-tab .tab-content .history-content p {
    width: 100%;
  }

  .bixol-history-block .ab-history-tab .tab-control ul {
    justify-content: flex-start;
    overflow: auto;
    flex-wrap: nowrap;
  }
  .bixol-history-block .ab-history-tab .tab-control ul li {
    flex: none;
    width: 33.333%;
    flex-shrink: 0;
  }
  .bixol-history-block .ab-history-tab .tab-content .tab-pane {
    top: 20px;
  }
  .bixol-history-block .ab-history-tab .tab-content .history-content h4 span {
    padding: 0 0 0 20px;
  }
}